Techniques for communicating sidelink synchronization signals in existing wireless communication deployments

Abstract

Some aspects described herein relate configuring resources in one or more slots for communicating a sidelink synchronization signal (SLSS) while maintaining a logical numbering of multiple consecutive slots including the one or more slots. Based on configuring the at least one slot a SLSS can be received from a node or transmitted to one or more nodes during at least one slot of the one or more slots.

What is claimed is: 
     
         1 . An apparatus for wireless communication, comprising:
 a transceiver;   a memory configured to store instructions; and   one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:
 configure resources in one or more slots for communicating a sidelink synchronization signal (SLSS) while maintaining a logical numbering of multiple consecutive slots including the one or more slots; and 
 at least one of:
 receive, during at least one slot of the one or more slots, a SLSS from a node; or 
 transmit, during at least one slot of the one or more slots, a SLSS to one or more nodes. 
 
   
     
     
         2 . The apparatus of  claim 1 , wherein the one or more processors are further configured to, based on receiving the SLSS from the node, synchronize at least one of timing or frequency of a transceiver based on the SLSS. 
     
     
         3 . The apparatus of  claim 2 , wherein the one or more processors are further configured to, based on synchronizing at least one of the timing or frequency of the transceiver based on the SLSS, transmit, during at least a second slot of the one or more slots, a second SLSS to one or more nodes. 
     
     
         4 . The apparatus of  claim 1 , wherein the resources include two or three resources over a time period of a duration that is a multiple of 100 or 160 milliseconds. 
     
     
         5 . The apparatus of  claim 1 , wherein the one or more processors are further configured to transmit a scheduling assignment (SA) without data to reserve at least the resources in the one or more slots for communicating the SLSS. 
     
     
         6 . The apparatus of  claim 5 , wherein the one or more processors are configured to transmit the SA based on at least one of a periodicity or expiration of a timer or a probability. 
     
     
         7 . The apparatus of  claim 5 , wherein a periodicity of the resources is based on a periodicity of the SA. 
     
     
         8 . The apparatus of  claim 5 , wherein the one or more processors are configured to transmit the SA based at least in part on determining that another SA is not transmitted by another UE for the one or more slots. 
     
     
         9 . The apparatus of  claim 5 , wherein the SA reserves, in the one or more slots, a larger set of resources including the resources configured for communicating SLSS. 
     
     
         10 . A method for wireless communication, comprising:
 configuring resources in one or more slots for communicating a sidelink synchronization signal (SLSS) while maintaining a logical numbering of multiple consecutive slots including the one or more slots; and   at least one of:
 receiving, during at least one slot of the one or more slots, a SLSS from a node; or 
 transmitting, during at least one slot of the one or more slots, a SLSS to one or more nodes. 
   
     
     
         11 . The method of  claim 10 , further comprising, based on receiving the SLSS from the node, synchronizing at least one of timing or frequency of a transceiver based on the SLSS. 
     
     
         12 . The method of  claim 11 , further comprising, based on synchronizing at least one of the timing or frequency of the transceiver based on the SLSS, transmitting, during at least a second slot of the one or more slots, a second SLSS to one or more nodes. 
     
     
         13 . The method of  claim 10 , wherein the resources include two or three resources over a time period of a duration that is a multiple of 100 or 160 milliseconds. 
     
     
         14 . The method of  claim 10 , further comprising transmitting a scheduling assignment (SA) without data to reserve at least the resources in the one or more slots for communicating the SLSS. 
     
     
         15 . The method of  claim 14 , wherein transmitting the SA is based on at least one of a periodicity or expiration of a timer or a probability. 
     
     
         16 . The method of  claim 14 , wherein a periodicity of the resources is based on a periodicity of the SA. 
     
     
         17 . The method of  claim 14 , wherein transmitting the SA is based at least in part on determining that another SA is not transmitted by another UE for the one or more slots. 
     
     
         18 . The method of  claim 14 , wherein the SA reserves, in the one or more slots, a larger set of resources including the resources configured for communicating SLSS. 
     
     
         19 . An apparatus for wireless communication, comprising:
 means for configuring resources in one or more slots for communicating a sidelink synchronization signal (SLSS) while maintaining a logical numbering of multiple consecutive slots including the one or more slots; and   at least one of:
 means for receiving, during at least one slot of the one or more slots, a SLSS from a node; or 
 means for transmitting, during at least one slot of the one or more slots, a SLSS to one or more nodes. 
   
     
     
         20 . The apparatus of  claim 19 , further comprising means for, based on receiving the SLSS from the node, synchronizing at least one of timing or frequency of a transceiver based on the SLSS. 
     
     
         21 . The apparatus of  claim 20 , further comprising means for, based on synchronizing at least one of the timing or frequency of the transceiver based on the SLSS, transmitting, during at least a second slot of the one or more slots, a second SLSS to one or more nodes. 
     
     
         22 . The apparatus of  claim 19 , wherein the resources include two or three resources over a time period of a duration that is a multiple of 100 or 160 milliseconds. 
     
     
         23 . The apparatus of  claim 19 , further comprising means for transmitting a scheduling assignment (SA) without data to reserve at least the resources in the one or more slots for communicating the SLSS. 
     
     
         24 . The apparatus of  claim 23 , wherein the means for transmitting the SA transmits the SA based on at least one of a periodicity or expiration of a timer or a probability. 
     
     
         25 . A computer-readable medium, comprising code executable by one or more processors for wireless communications, the code comprising:
 code for configuring resources in one or more slots for communicating a sidelink synchronization signal (SLSS) while maintaining a logical numbering of multiple consecutive slots including the one or more slots; and   at least one of:
 code for receiving, during at least one slot of the one or more slots, a SLSS from a node; or 
 code for transmitting, during at least one slot of the one or more slots, a SLSS to one or more nodes. 
   
     
     
         26 . The computer-readable medium of  claim 25 , further comprising code for, based on receiving the SLSS from the node, synchronizing at least one of timing or frequency of a transceiver based on the SLSS. 
     
     
         27 . The computer-readable medium of  claim 26 , further comprising code for, based on synchronizing at least one of the timing or frequency of the transceiver based on the SLSS, transmitting, during at least a second slot of the one or more slots, a second SLSS to one or more nodes. 
     
     
         28 . The computer-readable medium of  claim 25 , wherein the resources include two or three resources over a time period of a duration that is a multiple of 100 or 160 milliseconds. 
     
     
         29 . The computer-readable medium of  claim 25 , further comprising code for transmitting a scheduling assignment (SA) without data to reserve at least the resources in the one or more slots for communicating the SLSS. 
     
     
         30 . The computer-readable medium of  claim 29 , wherein the code for transmitting the SA transmits the SA based on at least one of a periodicity or expiration of a timer or a probability.